Twitter suspended more than 376,000 accounts in the second half of 2016, most of which it said were promoting terrorism.

Most of the accounts, 74 percent, were removed by proprietary software, the company said in its latest transparency report. The software reportedly determines a terrorism related account through how it behaves, rather than what it posts, saying the accounts have “distinctive behavior.”

Two percent of the accounts were suspended by various government requests, according to Twitter.

The number of suspensions is three times more than the social media site deleted in the last half of 2015.

In total, the company says it suspended 636,280 accounts from August 1, 2015 to December 31, 2016.

The report comes as Facebook and Google are wrestling with how to prevent objectionable content from their sites.